1. D. Alpay, D. Gohberg, Unitary rational matrix functions and orthogonal matrix polynomials,to appear in Operator Theory: Advanced and Applications.
2. J.A. Ball, N. Cohen, A.C.M. Ran, Inverse spectral problems for regular improper rational matrix functions, Topics in Interpolation Theory of Rational Matrix-valued Functions (ed. I. Gohberg ), Birkhaüser, Basel (1988), pp. 123–173.
3. J.A. Ball, I. Gohberg, L. Rodman, Realization and Interpolation of rational of rational matrix functions, Operator Theory: Advances and Applications, 33 (1988), 1–72.
4. J.A. Ball, I. Gohberg, L. Rodman, Minimal factorizations of meromorphic matrix functions in terms of local data, Integral Equations and Operator Theory 10 (1987), 309–348.
5. J.A. Ball, I. Gohberg, L. Rodman, Two-sided Lagrange-Sylvester interpolation problems for rational matrix functions, submitted to Proceedings of the AMS Summer Research Institute in Operator Theory and Operators Algebras, Durham, New Hampshire (1988).